I had the pleasure of hearing the BACCH system at CAF today which simulates 3d sound. https://invention.princeton.edu/news/edgar-choueiri-bacchtm-3d-sound . This was a night and day effect on the audio that is hard to describe without saying 3d. The sound stage and positioning of sound seemed incredibly accurate and real. Very cool stuff.

This confuses me a little bit, reading how it works. So they're saying crosstalk between speakers is bad? If so, why are headphone and IEM people saying those can't stage well because they're missing the crosstalk?

There is a certain amount of crosstalk you need in order for something to sound natural because a sound for a single source will diffract around your head in a frequency dependent manner to reach both of your ears.

If I'm reading their website correctly, BACCH seems to use crosstalk cancellation as a first step to make other DSP magic possible.

There is a certain amount of crosstalk you need in order for something to sound natural because a sound for a single source will diffract around your head in a frequency dependent manner to reach both of your ears.

If I'm reading their website correctly, BACCH seems to use crosstalk cancellation as a first step to make other DSP magic possible.

Click to expand...

Thats how I understood the basic approach except its dynamic as it tracks an individuals head. It seems like its capable of doing more. For instance he talked about making headphones have the sound quality of a martin logan for instance and also having a changing sound perspective based on your head movement.